The serial number must be set in a standard aset field in the motherboard : this field exist generaly on professional motherboard only (like HP computer for enterprise).
For manufacturer : it is generaly show on MMANUFACTURER field in the BIOS section.
Run dmidecode software on your linux and look if you see more information on your motherboard, if you don't see it, that's because your motherboard don't give the informations.